401333321 has 4 divisors (see below), whose sum is σ = 401437200. Its totient is φ = 401229444.

The previous prime is 401333299. The next prime is 401333327. The reversal of 401333321 is 123333104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401333321 is a prime.

It is a super-2 number, since 2×401333321² = 322136869089778082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401333293 and 401333302.

It is not an unprimeable number, because it can be changed into a prime (401333327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45911 + ... + 53948.

It is an arithmetic number, because the mean of its divisors is an integer number (100359300).

Almost surely, 2^401333321 is an apocalyptic number.

It is an amenable number.

401333321 is a deficient number, since it is larger than the sum of its proper divisors (103879).

401333321 is an equidigital number, since it uses as much as digits as its factorization.

401333321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103878.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 401333321 is about 20033.3052939349. The cubic root of 401333321 is about 737.6240578819.

Adding to 401333321 its reverse (123333104), we get a palindrome (524666425).

The spelling of 401333321 in words is "four hundred one million, three hundred thirty-three thousand, three hundred twenty-one".